The craziest Advent Calendar you are likely to see. 'Kkkatzenadvent' is an experimental Advent Calendar filled with cat illustrations and is brought to us in One Page by Natalie Ofenböck and die halbstarken. You need to click the dates in order and it of courses stops access based on the current date.
An advent calendar with cccats. Really there isn't more to say about it. It uses pixi.js for rendering. That's it. And the intro translates to: 'I don't have an advent calendar. - Yes you do.'. The illustrations on the website are from Natalie Ofenböck. The programming and animations are from die halbstarken.